Belting



(No Model.)

B. F. GOODRICH.

i BBLTING. No. 270,303. Patente Jan. 9,1883.

Wzltvzessws: lwenor N. PETKRS, Pham-umugnpher. washington. |104 C,

UNITED STATES PATENTl OFFICE.

BENJAMIN E. eooDEIoH, or AKRON, onto..

BELTING.

SPECIFICATION forming part of Letters Patent No. 270,303, datedJanuary9,1883.

Application iiledMay 5, 1 882. (No model.)

.To all whom 'it may concern:

Be it known that I, BENJAMIN F. GooD'EIoH, of Akron, in the county ofSummit and State of Ohio, have invented a new and useful Improvement inBelting, of which the followingis a specification.

Myinvention has relation generally to that class of beltingwhichconsists of a woven fabric covered with and adhering to outsidelayers of vulcanized rubber. Heretofore it has been customary to makesuch belting by one of the following methods, to each of which thereexist Substantial objections In oneasingle-plyfabric-such as heavyduck-is used. A sheet of this is frictionerW-,that is, rubber preparedfor vulcanizing is, by means of heavy rollers ruiming at different ratesof speed, rubbed into the fabric, so as to thoroughly saturateit--andupon one side ofthisis then placed and presseda'layerof preparedrubber.From this sheet a strip is cnt double the width of the desired belt forthe outside or cover of the belt. A filling is prepared of strips offrictioned iabric as wide as the belt placed upon each other until thedesired strength is'obtained. The cover is then folded over this lling., the rubber coat outside, the edges brought The strip coveringtheseam frequently becomes loosened, permitting the cover to separatefromihe filling. The layers of filling, being held together' by cohesionof the friction coat, are liable to separate, rendering the beltpractically valueless. The additional layers of rubber render the wholestiff and illy adapted to small pulleys, and inrcases of great strain,particularly on small pulleys, this coat rolls or rubs u p into ridges,makin g the surface uneven and preventing complete and perfect contactwith the pulley. In the other method a close-woven fabric-two, three, ormore plyt frictional qualities of ordinary rubber belting' and theadditional advantages of a perfectly even surface, be thoroughlystretched, and much more flexible than beiting of the same strengthprepared in the manner before stated.

My invention consists in employing the materials and prepared in themanner following:

4l ta-ke'for niy foundation a close-woven fabric of three, four, or moreply of the desired Width. I then friction this-that is, saturate it withrubber prepared Afor vulcanizing-in the manner before stated, stretch itthoroughly, and while so stretched press it in a hydraulic press betweenpolished metallic plates, and vulcanize it in that condition. By thefriction coat I obtainall the advantages of the rubber coat, and byomitting the outside coat of rubber I gain dexibility and avoid thedisadvantages enumerated before. Tile belt comes from the pressthoroughly stretched and with a smooth and even surface.

I claim- The heroin-described process of manufacturing belting, whichconsists in applying to a close-Woven'multiply-fabric a friction coat of'nbber, thoroughly stretching the sume, and while stretched pressing itbetween smooth metallic plates and vulcanizing it in that condition,substantaily as and for the purpose hereinbefore set forth.

ln testimony that I claim the foregoing I have hereunto set my hand this31st day of March, A. D. 1882.

BENJAMIN F. GOODRICH.

Witnesses:

G. P. HUMPHREY, E. W. STUART.

